//exercício 5
//Felipe Vieira Conway Baccarat

//inclui as bibliotecas
#include <Wire.h>
#include <LiquidCrystal_I2C.h> 

//define os pinos dos sensores e dos leds
#define PIN_ECHO_1 13
#define PIN_ECHO_2 12
#define PIN_ECHO_3 11
#define PIN_ECHO_4 10
#define PIN_TRIG_1 A0
#define PIN_TRIG_2 A1
#define PIN_TRIG_3 A2
#define PIN_TRIG_4 A3
#define led_vm_1 2
#define led_vm_2 3
#define led_vm_3 4
#define led_vm_4 5
#define led_vd_1 6
#define led_vd_2 7
#define led_vd_3 8
#define led_vd_4 9

const int Pinos[8] = {2, 3, 4, 5, 6, 7, 8, 9};

int distanciaCM_1, distanciaCM_2, distanciaCM_3, distanciaCM_4 = 0;
LiquidCrystal_I2C lcd(0x27, 16, 2);
byte quadrado[8] = {
0b11111,
0b10001,
0b10001,
0b10001,
0b10001,
0b10001,
0b11111,
0b00000,
};
byte quadradox[8] = {
0b11111,
0b10001,
0b11011,
0b10101,
0b11011,
0b10001,
0b11111,
0b00000,
};


void setup() {
  lcd.init();
  lcd.createChar(0, quadrado);
  lcd.createChar(1, quadradox);
  lcd.setBacklight(HIGH);

  for(int s = 2; s < 10; s++) { 
    pinMode(Pinos[s], OUTPUT); 
      }
  pinMode(PIN_ECHO_1, INPUT);
  pinMode(PIN_ECHO_2, INPUT);
  pinMode(PIN_ECHO_3, INPUT);
  pinMode(PIN_ECHO_4, INPUT); 
  pinMode(PIN_TRIG_1, OUTPUT);
  pinMode(PIN_TRIG_2, OUTPUT);
  pinMode(PIN_TRIG_3, OUTPUT);
  pinMode(PIN_TRIG_4, OUTPUT);
}

void loop() {
  int n_ocup = 0;

  digitalWrite(PIN_TRIG_1, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG_1, LOW);

  int duration1 = pulseIn(PIN_ECHO_1, HIGH);
  distanciaCM_1 = (duration1 / 58);

  digitalWrite(PIN_TRIG_2, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG_2, LOW);

  int duration2 = pulseIn(PIN_ECHO_2, HIGH);
  distanciaCM_2 = (duration2 / 58);

  digitalWrite(PIN_TRIG_3, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG_3, LOW);

  int duration3 = pulseIn(PIN_ECHO_3, HIGH);
  distanciaCM_3 = (duration3 / 58);

  digitalWrite(PIN_TRIG_4, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG_4, LOW);

  int duration4 = pulseIn(PIN_ECHO_4, HIGH);
  distanciaCM_4 = (duration4 / 58);

  delay(3000);

//vaga 1
if(distanciaCM_1 < 181){
  int vaga1O = 1;
  n_ocup += vaga1O;
  lcd.setCursor(0,1);
  lcd.write(byte(1));
  digitalWrite(led_vd_1, 0);
  digitalWrite(led_vm_1, 1);
 }
  else if(distanciaCM_1 > 180){
  int vaga1L = 0;
  n_ocup += vaga1L;
  lcd.setCursor(0,1);
  lcd.write(byte(0));
  digitalWrite(led_vd_1, 1);
  digitalWrite(led_vm_1, 0);
 }

//vaga 2
if(distanciaCM_2 < 181){
  int vaga2O = 1;
  n_ocup += vaga2O;
  lcd.setCursor(1,1);
  lcd.write(byte(1));
  digitalWrite(led_vd_2, 0);
  digitalWrite(led_vm_2, 1);
 }
  else if(distanciaCM_2 > 180){
  int vaga2L = 0;
  n_ocup += vaga2L;
  lcd.setCursor(1,1);
  lcd.write(byte(0));
  digitalWrite(led_vd_2, 1);
  digitalWrite(led_vm_2, 0);
 }

//vaga 3
if(distanciaCM_3 < 181){
  int vaga3O = 1;
  n_ocup += vaga3O;
  lcd.setCursor(2,1);
  lcd.write(byte(1));
  digitalWrite(led_vd_3, 0);
  digitalWrite(led_vm_3, 1);
 }
  else if(distanciaCM_3 > 180){
  int vaga3L = 0;
  n_ocup += vaga3L;
  lcd.setCursor(2,1);
  lcd.write(byte(0));
  digitalWrite(led_vd_3, 1);
  digitalWrite(led_vm_3, 0);
 }

//vaga 4
if(distanciaCM_4 < 181){
  int vaga4O = 1;
  n_ocup += vaga4O;
  lcd.setCursor(3,1);
  lcd.write(byte(1));
  digitalWrite(led_vd_4, 0);
  digitalWrite(led_vm_4, 1);
 }
  else if(distanciaCM_4 > 180){
  int vaga4L = 0;
  n_ocup += vaga4L;
  lcd.setCursor(3,1);
  lcd.write(byte(0));
  digitalWrite(led_vd_4, 1);
  digitalWrite(led_vm_4, 0);
 }

  lcd.setCursor(0,0);
  lcd.print("1234  livres ");
  int n_livres = 4 - n_ocup;
  lcd.print(n_livres);
  lcd.setCursor(6,1);
  lcd.print("ocupadas ");
  lcd.print(n_ocup);
delay(500);


}